fmw
No longer a newbie, moving up!
You want to expose for the subjects, not the background. Your images are all underexposed. You should be able to bring up the brightness in the software. Get the faces right and let the rest go wherever it wants to go.
Thank you. This is very helpful. Tips for exposing the subjects and not the background?
There are plenty of articles and books about photographic exposure. No need for me to repeat the techniques. Perhaps you have a library in your area that can help. Personally, I like having a blown out back ground. I wouldn't have used fill flash. I would just have exposed for the subjects. A properly exposed background would just be a distraction. You did fine other than underexposing the subjects.
I don't think you are ready to charge people money for your photography.